MNT : make test to skip lasso a bit more reliable
MNT : make test to skip lasso a bit more reliable

 - if more that one axes, only process events in self.ax

licode/xray-vision,giltis/xray-vision,giltis/xray-vision,licode/xray-vision,sameera2004/xray-vision,sameera2004/xray-vision,ericdill/xray-vision,ericdill/xray-vision